<script src="https://unpkg.com/vue/dist/vue.js"></script>
<div id="app">
    <span v-bind:title="massage">
        看我??
    </span>
</div>
<script>
    var app= new Vue(
        {
            el:"#app",
            data:{
              massage:'123',
            },
        }
    )
</script>